In addition to breast augmentation, Christina Pappas, seen pre-surgery (left), had lip injections -- and loves flaunting the results on Instagram.Edmund J Coppa

Ryan Mercurio, 27, had no qualms about blasting friends and co-workers with photos of her newly pumped-up pout when she got her first lip injections a year ago.

“I feel like every girl in this generation sends selfies when she gets her hair done or is trying on a new outfit, or just looks good and wants encouragement,” says the Bronx-based hairstylist. “Of course, I want people to give me feedback [on my lips].”

Mercurio says her peers are continually sharing their cosmetic enhancements.

“A lot of my friends use Snapchat, but I mainly send photos through text,” she says. “We do it all the time.”

For many millennials who grew up on social media, there’s no longer a stigma associated with plastic surgery. An enhnaced appearance is something to be shown off to friends, and there’s no shame in ’fessing up to going under the knife.

“Younger people want plastic surgery now,” says 20-year-old Christina Pappas, who had breast-augmentation surgery and lip injections a year ago. The East Meadow, LI, resident, who owns her own organic airbrush-tanning salon, cites Kylie Jenner for making lip injections so haute. “[She] changed everything,” Pappas says.

And like the reality star, Pappas takes pleasure in flaunting the results on Instagram.

“I used to be uncomfortable taking pictures of my face because I felt insecure about my lips — now, I feel confident,” she says, adding that she finds taking selfies “empowering.”

Ryan Mercurio was quick to send pals photos of her enhanced lips (right) after she had injections a year ago. She says many of her peers also share snaps of their cosmetic procedures.Courtesy of Ryan Mercurio

It helps that celebrities have made plastic surgery seem glamorous and enticing, rather than shameful. Bravo network stars regularly cop to boob jobs; Kaley Cuoco and Iggy Azalea have given candid interviews about going under the knife; and Goop, the lifestyle Web site founded by Gwyneth Paltrow, has published guides to Botox, fillers and noninvasive cosmetic procedures.

Plastic surgeon Dr. Melissa Doft says that about 30 percent of her millennial patients are referred to her through photo-sharing platforms.

“You won’t believe the amount of patients who come in saying, ‘I saw my friend who got a lip injection on Instagram, and she looked amazing!’ ” says Doft.

The doctor, who has her own practice on the Upper East Side, says that two years ago, no one snapped selfies at her office, much less shared them with friends or on social media. Now it’s a daily occurrence, and is especially common among younger patients.

“I’ve had patients taking selfies before an operation and then posting them on Instagram or sending them to their friends, like, ‘Look what I’m doing!’ ” says Doft.

Christina PappasEdmund J Coppa

A decade ago, women didn’t openly discuss their plastic surgeries, even if the results were obvious. Doft credits the change to plastic-surgery Web forums such as RealSelf with helping reduce the stigma about cosmetic procedures, and getting patients more comfortable revealing photos of the process. (RealSelf users upload some 1,200 images a day, compared with 60 a day five years ago.)

Some patients are even more public about their procedures, such as 24-year-old Arly Nguyen, who created her own hashtag, #boobye, before going through a breast reduction.

“When people don’t talk [about their plastic surgery], it implies [it’s] something to be kept secret,” says the digital marketer, who lives in Bushwick.

“It’s no big deal to get a boob job. It’s like getting a black dress.”

She even threw a party for all her friends the night before her operation. “Though by the middle of the night, we were too drunk to remember the hashtag!”

The trend extends beyond selfies, too. Doft says that the other day one of her clients came in for a lip injection with a pal. “The one asked, ‘Can I film this? I think our friends would be interested in seeing it.’ ”

But for most young women a sexy selfie passed among friends is enough. As to why Mercurio likes to share photos of her new lips? “They’re just beautiful,” she says.

Arly Nguyen, a 24-year-old Bushwick resident, threw a party for her friends the night before she underwent a breast reduction, using the hashtag #boobye on Instagram.Stefano Giovannini; Instagram/practicalpretty